Hadith #202
Arabic Text
حَدَّثَنَا عَبْدُ الرَّزَّاقِ أَخْبَرَنَا ابْنُ جُرَيْجٍ أَخْبَرَنِي أَبُو الزُّبَيْرِ أَنَّهُ سَمِعَ جَابِرَ بْنَ عَبْدِ اللَّهِ يَقُولُ رَأَيْتُ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُصَلِّي وَهُوَ عَلَى رَاحِلَتِهِ النَّوَافِلَ فِي كُلِّ جِهَةٍ وَلَكِنَّهُ يَخْفِضُ السُّجُودَ مِنْ الرَّكْعَةِ وَيُومِئُ إِيمَاءً
English Translation
Abd al-Razzaq narrated to us, Ibn Jurayj informed us, Abu al-Zubayr informed me that he heard Jabir ibn Abdullah (رضي الله عنه) say: I saw the Prophet ﷺ praying while on his riding mount, praying voluntary prayers in whichever direction his mount faced. But when he wanted to pray an obligatory prayer, he would dismount and face the qiblah.
Quran References
Reference: Musnad Ahmad, Book 28, Hadith 202
Sunnah.com ref: Musnad Ahmad 13640
Islam.wiki ID: IWH-50030